OAKLAND _ A Yoshi’s sound engineer is in custody this morning after he entered the jazz club on Embarcadero at 8:45 a.m. and destroyed equipment with a baseball bat, Oakland police said. Yoshi’s will reopen tonight. But the employee, Dan Pettit, was arrested for felony vandalism, police said. He took a bat to dressing rooms, as well as an office and performance areas, police said. He damaged computers and pictures, and turned over tables and chairs. Police estimated the damage at $10,000. Pettit refused to speak to officers or explain if he used his keys to enter.

Police said Pettit felt that he was defending a colleague whose sound engineering during Wednesday night’s performances had caused concern. The opening act was rhythm and blues musician R.O.D. His last set ended without incident at 10 p.m.

A record-release party connected to a vintage DJ series called “45 Sessions” followed. It is not clear what provoked the dispute or who was involved besides Pettit.

In a video clip recorded by a student, a psychology instructor at Orange Coast College told her class that the election of Donald Trump was “an act of terrorism” – prompting an official complaint from the school’s Republican Club.